Yosemite upgrade from Mountain lion

[garfielder]

Yosemite upgrade from Mountain lion. Problem with transfering old data back

Sorry guys.
Sadly nothing really original here.
I have Asus P67 sabertooth with AMD 6870
Running Mountain Lion pretty nicely.

Want to upgrade to Yosemite but seems to be hitting a brick wall.
First I tried to copy existing system and follow usual path of upgrade (Got into very typical stuck on half of loaded progress bar.)
Then I tried it on the empty drive.
Works nicely. Did multibeast - still fine.
Then I tried to run user migration tool to get data from other drive with mountain lion.
Process go well. After reboot - I am again stuck at half of the progress bar
Would appreciate advise

 

[kkim]

Hello everyone. I am trying to upgrade from 10.8.6 to Yosemite and am running into problems too, hopefully someone can shed some light with their insights here.

What I did so far.

I basically started following the Guide: Update OS X Mavericks to OS X Yosemite Using UniBeast and MultiBeast even though I'm on Mountain Lion. I removed :

from org.chameleon.Boot.plist

Then I downloaded Yosemite and put it on a usb with UniBeast. (USB used is 500gb so I made a 10gb partition for UniBeast.) Then I tried to boot from the USB and got the "can't find Mach Kernel" error. I tried using various combination bootflags with no success (-v, -x, -f).

Most worrying is that now I can't even boot into Mountain Lion. I just get the Grey Apple screen on one monitor and then it loses signal (but power is still going) so I hard reset and try again. I tried booting with -x -v GraphicsEnabler=Yes; and it worked *once*. Now, I'm stuck trying to just boot Mountain Lion before I figure out how to install Yosemite.

..I suspect that removing the <key> and <string> line in org.chameleon.Boot.plist is causing the booting problems.

Any thoughts?

 

[gfm6]

I created a boot usb drive without ever deleting any files that were suggested and yet I also get the "can't find Mach Kernel" error.

Even when it tries to boot it will freeze shortly and there's just a black screen. Adding various boot options doesn't help at all.

Looks like it's another of those just can't get there from here deals.

 

[kkim]

GREAT SUCCESS!

After spending the better part of yesterday trying to make this work I have managed to upgrade to Yosemite from my aging Mountain Lion.

This is how I did it:

• On my hackintosh, I edited org.chameleon.Boot.plist and removed the following 2 lines:

• I downloaded Yosemite & created a bootable USB with UniBeast.
• I booted from USB and installed Yosemite on my OSX drive. The only way I could make this step work was by pressing F12 and booting the USB from there. Booting from the Chimera screenwould bring up the 'can't find mach kernel'. (Note: At this point, I couldn't even boot my ML OSX, I suppose due to removing the 2 aforementioned lines?)
• After installation completed, an automatic restart is due. Pressing F12 allowed me to boot from the USB and I selected the OSX hard drive. I got a few random freezes here (progress bar loading until at about 45% and stopping) and repeated the installation a couple of times until I got it right. To bypass the freeze I typed -x -v.
• I entered Yosemite. I ran Multibeast. I restarted the hackintosh and removed the USB.
• The first time I got a freeze again, so I tried again with safe mode. Once I was in I did a Repair Disk Permissions. I rebooted and Yosemite loaded up ok.

I basically followed the Guide: Update OS X Mavericks to OS X Yosemite Using UniBeast and MultiBeast thread, with lots of trial & error, and a few amendments based on my individual setup.

It really seems simple in retrospect, and it is - but messing up little things on each step can really set you off track. I considered installing with Clover for a while but then decided to give this another shot and I'm glad I did.

I've been using Yosemite for a at least 6 hours now and everything seems perfect. That's all. Thanks to everyone's comments, they've been immensely helpful.

 

[garfielder]

My problem sadly is that on clean install it's all fine.
Any upgrade (I even did upgrade to Maverick first. And that works just fine.) but if i upgrade or transfer i am always stuck at 40-50%.
Even in safe verbose mode etc.